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发明名称
Photocell-amplifier circuit
摘要
申请公布号
US2673935(A)
申请公布日期
1954.03.30
申请号
US19510253285
申请日期
1951.10.26
申请人
RADIO CORPORATION OF AMERICA
发明人
WALDHAUER FRED D.
分类号
G11B7/00
主分类号
G11B7/00
代理机构
代理人
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地址
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